赤铁矿, also known as hematite, is a common iron oxide mineral with the chemical formula Fe2O3. It is typically found in sedimentary rocks and is a primary source of iron ore. The mineral appears in various colors, including reddish-brown, silver-gray, and black, and has a metallic luster. This mineral is significant in the production of iron and steel, making it essential for various industries. Hematite is often processed through methods like crushing and grinding to extract iron, which is then used in construction, manufacturing, and other applications.